HarrisDemocratic58.3%7,654TrumpRepublican39.8%5,230OtherAll other candidates1.9%248
D+18.5- Lead
- 2,424
- Total
- 13,132
- vs nation
- D+19.9
modeled Census-place estimatemodeled estimate
Akashicstate house district
Delaware 21st State House District
Contests in this Place (46 available)
President38 · 1876–2024 · 3 mapped
▦ precinct · ▥ counties · ▢ no spatial detail
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the district’s overall result across 1892–2024, on its current boundaries.
President results by year
Modeled candidate-vote estimate on current district boundaries
BidenDemocratic60.5%8,252TrumpRepublican37.6%5,119OtherAll other candidates1.9%260
D+23.0- Lead
- 3,133
- Total
- 13,631
- vs nation
- D+18.5
modeled Census-place estimatemodeled estimate
ClintonDemocratic53.8%6,845TrumpRepublican40.4%5,141OtherAll other candidates5.9%746
D+13.4- Lead
- 1,704
- Total
- 12,732
- vs nation
- D+11.3
modeled Census-place estimatemodeled estimate
ObamaDemocratic58.0%7,025RomneyRepublican40.1%4,859OtherAll other candidates1.9%235
D+17.9- Lead
- 2,166
- Total
- 12,119
- vs nation
- D+14.0
modeled Census-place estimatemodeled estimate
ObamaDemocratic61.6%7,515McCainRepublican36.7%4,479OtherAll other candidates1.7%209
D+24.9- Lead
- 3,036
- Total
- 12,203
- vs nation
- D+17.6
modeled Census-place estimatemodeled estimate
KerryDemocratic51.7%6,136BushRepublican47.2%5,603OtherAll other candidates1.1%127
D+4.5- Lead
- 533
- Total
- 11,866
- vs nation
- D+6.9
modeled Census-place estimatemodeled estimate
GoreDemocratic51.3%5,362BushRepublican45.1%4,713OtherAll other candidates3.6%377
D+6.2- Lead
- 649
- Total
- 10,452
- vs nation
- D+5.7
modeled Census-place estimatemodeled estimate
ClintonDemocratic46.5%4,155DoleRepublican41.0%3,662OtherAll other candidates12.5%1,119
D+5.5- Lead
- 493
- Total
- 8,936
- vs nation
- R+3.0
modeled Census-place estimatemodeled estimate
Key facts
- 2024 presidential margin
- D+18.5MIT Election Lab
- Population
- 24,0502024 5-year
- Population density
- 2,586 / sq mi2024 5-year · TIGER/Line
- Land area
- 9.3 sq miTIGER/Line
- Median household income
- $101,2862024 5-year
- White (non-Hispanic)
- 72.1%2024 5-year
- Black
- 8.5%2024 5-year
- Hispanic / Latino
- 7.6%2024 5-year
- Peak Democratic margin
- D+24.9 in 2008MIT Election Lab
- Peak Republican margin
- R+50.1 in 1928MIT Election Lab
- Most similar
- State Representative District 25, DE · twin score 86.4
presidential history
Party record book
Delaware 21st State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Barack Obama2008
61.6%
7,515 votes · D+24.9 · modeled estimate
Runner-up · Joe Biden, 2020 · 60.5%
Republican
Herbert Hoover1928
74.8%
2,858 votes · R+50.1 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 67.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
8,252votes
60.5% of the vote · D+23.0 · modeled estimate
Runner-up · Kamala Harris, 2024 · 7,654 votes
Republican
Ronald Reagan1984
6,153votes
65.5% of the vote · R+31.4 · modeled estimate
Runner-up · Richard Nixon, 1972 · 6,054 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Kamala Harris2024
+19.9pts D vs U.S.
Place D+18.5 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +18.5 pts
Republican
Herbert Hoover1932
+43.9pts R vs U.S.
Place R+26.1 · U.S. D+17.8 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +32.7 pts
current representation
Current officeholders
DFrank BurnsState House · 21
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 3 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
With a 2024 presidential margin of D+18.4, Delaware's 21st House district ranks among the state's more Democratic-leaning constituencies, reflecting the dense suburban and residential character typical of northern New Castle County.
Across the recorded series it reached a Democratic high of 24.9 points in 2008 and a Republican high of 50.1 points in 1928. Between 2020 and 2024 the district moved 4.5 points toward the Republican candidate; the 2024 margin was 18.5 points.
A population of 24,050, a 72% non-Hispanic-white share, and a median household income of $101,286 describe the district. The district's voting pattern over the last decade is most similar to that of State Representative District 25 and State Representative District 19.
Political twins — state-house districts
The state-house districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
State Representative District 25
Delaware
86.4twin score
elasticity2008–2020 trajectory% Catholic≠ median age
State Representative District 19
Delaware
85.8twin score
elasticity2008–2024 trajectory≠ Puerto Rican ancestry
State Representative District 8
Delaware
85.1twin score
2008–2024 trajectoryelasticity≠ % Black
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Delaware 21st State House District. Akashic. https://akashic.app/sld-lower/10021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Delaware at the ballot boxAll elections →
Frequently asked questions
How did Delaware 21st State House District vote in 2024?
In 2024, Delaware 21st State House District voted Democratic by 18.5 points (D+18.5), carried by the Democratic candidate. Out of 13,132 votes cast, 7,654 went Democratic and 5,230 went Republican.
When did Delaware 21st State House District last vote Republican?
The most recent presidential election in which Delaware 21st State House District voted Republican was 1992.
How many people live in Delaware 21st State House District?
Delaware 21st State House District has a population of 24,050 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Delaware 21st State House District?
Median household income in Delaware 21st State House District is $101,286 — above the national median of $80,734. The Delaware state median is $84,954.
What is the political history of Delaware 21st State House District?
Akashic tracks 38 presidential elections in Delaware 21st State House District from 1876 to 2024. Of those, 10 went Democratic and 28 went Republican.